Catalytic incineration of organic compounds

Abstract

A catalyst is disclosed for treating gas streams containing organic compounds such as halogenated organic compounds. The catalyst is comprised of vanadium oxide, zirconium oxide and at least one oxide of manganese, cerium or cobalt. Also disclosed is a process for treating gas streams using such catalysts.

What is claimed is: 
     
       1. A catalyst for treating a gas stream containing compounds selected from the group consisting of halogenated organic compounds, other organic compounds and mixtures thereof, said catalyst comprising from about 40 up to about 88 weight percent of zirconium oxide and (i) vanadium oxide and (ii) at least one oxide selected from the group consisting of manganese oxide, cerium oxide and cobalt oxide. 
     
     
       2. A catalyst according to claim 1 wherein said catalyst is characterized by a core material comprising zirconium oxide and one or more oxides of manganese, cerium or cobalt. 
     
     
       3. A catalyst according to claim 2 wherein the vanadium oxide is dispersed on the core material in an amount from about 0.1 weight percent up to about 20 weight percent (as V 2  O 5 ) of the catalyst. 
     
     
       4. A catalyst according to claim 2 wherein zirconium oxide is present in the core material in an amount from about 50 weight percent up to about 90 weight percent (as ZrO 2 ). 
     
     
       5. A catalyst according to claim 2 wherein manganese oxide is present in the core material in an amount from about 10 weight percent up to about 50 weight percent (as Mn 2  O 3 ). 
     
     
       6. A catalyst according to claim 2 wherein said core material consists essentially of zirconium oxide and manganese oxide. 
     
     
       7. A catalyst according to claim 1 wherein the catalyst further contains one or more platinum group metals in an amount from about 0.01 up to about 5 weight percent of the catalyst. 
     
     
       8. A catalyst according to claim 1 wherein the catalyst further contains tungsten oxide, tin oxide or mixtures thereof. 
     
     
       9. A catalyst according to claim 8 wherein tungsten oxide is present in an amount from about 5 up to about 20 weight percent (as WO 3 ) of the catalyst. 
     
     
       10. A catalyst according to claim 2 wherein the surface area of the core material is from about 25 m 2  /g up to about 275 m 2  /g. 
     
     
       11. A catalyst for treating a gas stream containing compounds selected from the group consisting of halogenated organic compounds, other organic compounds and mixtures thereof, said catalyst comprising i) a core material consisting essentially of zirconium oxide and manganese oxide; and ii) vanadium oxide dispersed on said core material in an amount from about 0.1 weight percent up to about 20 weight percent (as V 2  O 5 ) of the catalyst. 
     
     
       12. A catalyst according to claim 11 wherein one or more platinum group metals are further dispersed on the core material in an amount from about 0.01 up to about 5 weight percent of the catalyst. 
     
     
       13. A catalyst according to claim 11 wherein tungsten oxide, tin oxide or mixtures thereof are further dispersed on the core material. 
     
     
       14. A process for treating a gas stream containing compounds selected from the group consisting of halogenated organic compounds, other organic compounds and mixtures thereof, comprising contacting said gas stream at a temperature of from about 175° C. up to about 550° C. with a catalyst comprising from about 40 up to about 8 weight percent of zirconium oxide and (i) vanadium oxide and (ii) at least one oxide selected from the group consisting of manganese oxide, cerium oxide and cobalt oxide in the presence of an effective amount of oxygen and water. 
     
     
       15. A process according to claim 14 wherein said catalyst is characterized by a core material comprising zirconium oxide and one or more oxides of manganese, cerium or cobalt. 
     
     
       16. A process according to claim 15 wherein the vanadium oxide is dispersed on the core material in an amount from about 0.1 weight percent up to about 20 weight percent (as V 2  O 5 ) of the catalyst. 
     
     
       17. A process according to claim 15 wherein the zirconium oxide is present in the core material in an amount from 50 weight percent up to about 90 weight percent (as ZrO 2 ). 
     
     
       18. A process according to claim 15 wherein the amount of manganese oxide present in the core material is from about 10 weight percent up to about 50 weight percent (as Mn 2  O 3 ). 
     
     
       19. A process according to claim 15 wherein the catalyst further contains one or more platinum group metals dispersed on said core material in an amount from about 0.01 up to about 5 weight percent of the catalyst. 
     
     
       20. A process according to claim 14 wherein the catalyst further contains tungsten oxide, tin oxide or mixtures thereof. 
     
     
       21. A process according to claim 20 wherein tungsten oxide is present in an amount from about 5 up to about 20 weight percent (as WO 3 ) of the catalyst. 
     
     
       22. A process according to claim 15 wherein the surface area of the core material is from about 25 m 2  /g up to about 275 m 2  /g. 
     
     
       23. A process for treating a gas stream containing compounds selected from the group consisting of halogenated organic compounds, other organic compounds and mixtures thereof, comprising contacting said gas stream at a temperature of from about 175° C. up to about 550° C. with a catalyst comprising i) a core material consisting essentially of zirconium oxide and manganese oxide; and ii) vanadium oxide dispersed on said core material in an amount from about 0.1 weight percent up to about 20 weight percent (as V 2  O 5 ) of the catalyst. 
     
     
       24. A process according to claim 23 wherein said catalyst further contains one or more platinum group metals dispersed on the core material in an amount from about 0.01 up to about 5 weight percent of the catalyst. 
     
     
       25. A process according to claim 24 wherein the platinum group metal is platinum. 
     
     
       26. A process according to claim 24 wherein tungsten oxide, tin oxide or mixtures thereof are further dispersed on the core material.